Magas of Cyrene

Magas of Cyrene (323 BC-250 BC) was King of Cyrenaica from 276 to 250 BC, succeeding Ophellas and preceding Demetrius the Fair.

Biography
Magas was the first son of Berenice I and her first husband Philip, and his father died in 318 BC; a year later, his mother remarried to Ptolemy I Soter, the ruler of Egypt. Magas became a prince at his stepfather's court and a member of the Ptolemaic dynasty, and he was made governor of Cyrenaica in 295 BC. After his stepfather's death in 283 BC, Magas attempted to wrest independence from his stepbrother Ptolemy II Philadelphus, proclaiming himself King in 276 BC. In 274 BC, he attacked Egypt from the west as Antiochus I of Syria was attacking Palestine, but Magas had to cancel his invasion due to a Libyan revolt at home. Magas' daughter Berenice II married Ptolemy III Euergetes in a move to secure Cyrenaica's independence, and Magas died in 250 BC.